919100100091 has 16 divisors (see below), whose sum is σ = 968854203648. Its totient is φ = 870167452000.

The previous prime is 919100100049. The next prime is 919100100109. The reversal of 919100100091 is 190001001919.

It is a cyclic number.

It is not a de Polignac number, because 919100100091 - 2¹⁵ = 919100067323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919100100031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7715976 + ... + 7834186.

It is an arithmetic number, because the mean of its divisors is an integer number (60553387728).

Almost surely, 2^919100100091 is an apocalyptic number.

919100100091 is a deficient number, since it is larger than the sum of its proper divisors (49754103557).

919100100091 is a wasteful number, since it uses less digits than its factorization.

919100100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121682.

The product of its (nonzero) digits is 729, while the sum is 31.

The spelling of 919100100091 in words is "nine hundred nineteen billion, one hundred million, one hundred thousand, ninety-one".